... Material:Carbon steel Specification of our washer: 1.NameNon-standard flat washer with small holes 2.StandardDIN, IFI, ISO, JIS, ... etc7.Production TechniqueStamping, Machining,etc8.Production Capacity60Tons/Month9.PackageBulk in carton, small box, then pallet or wooden case10. ... box, then pallet or wooden case9.CertificateISO9001:2008Thank you for clicking our product,if you have any interest,pls ...